NSMutNSableDictionary (Safe)

gistfile1.txt

@implementation NSMutNSableDictionary(Swizzing)

+ (void)load {
    Class dictCls = NSClassFromString(@"__NSDictionaryM");
    Method originalMethod = class_getInstanceMethod(dictCls, @selector(setObject:forKey:));
    Method swizzledMethod = class_getInstanceMethod(dictCls, @selector(na_setObject:forKey:));
    method_exchangeImplementations(originalMethod, swizzledMethod);
}

- (void)na_setObject:(id)anObject forKey:(id<NSCopying>)aKey {
    NSLog(@"anObject : %@ ",anObject);
    if (!anObject)
        return;
    [self na_setObject:anObject forKey:aKey];
}

@end